WELDING TORCH FOR NARROW GROOVE

摘要

PURPOSE: A welding torch for a narrow groove is provided to maintain rigidity of an electrode and prevent increase of resistance by supplying a cooling medium into a nozzle adjacently installed to the electrode, thereby cooling the electrode and nozzle. CONSTITUTION: In a welding torch for a narrow groove comprising an electrode(1) which is fixed or rotated by being positioned at the center, and a nozzle(110) which is adjacently and symmetrically arranged around the electrode for supplying a protective gas to the front and rear surfaces of an advance direction of the electrode, the welding torch is characterized in that the protective gas passage(111) is arranged at the edge inside the nozzle(110), and a cooling medium passage(112) through which a cooling medium is circulated, wherein the cooling medium passage(112) is arranged at the inner side of the nozzle so that the cooling medium cools the electrode(1) and nozzle, wherein a supply pipe through which the cooling medium is supplied is arranged at the center of the cooling medium passage, and a discharging passage through which the cooling medium is discharged is formed along the outer circumference of the supply pipe.